S
M
T
W
T
F
S
30
100°
77°
31
99°
75°
1
99°
78°
2
102°
76°
3
105°
77°
4
101°
77°
5
99°
71°
6
94°
70°
7
94°
72°
8
94°
71°
9
94°
70°
10
95°
68°
11
99°
69°
12
97°
68°
13
93°
67°
14
91°
67°
15
88°
66°
16
87°
65°
17
86°
64°
18
85°
58°
19
80°
63°
20
81°
62°
21
87°
62°
22
84°
61°
23
80°
61°
24
78°
60°
25
79°
61°
26
81°
61°
27
79°
60°
28
78°
60°
29
77°
54°
30
82°
48°
1
73°
48°
2
74°
47°
3
73°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lamesa
Lamesa's September 2026 forecast shows daily high temperatures ranging from 73° to 99°, with overnight lows between 47° and 72°. The average high for September is 86° with an average low of 62°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Lamesa. See also: October | November | December.